Download - Periodic table-shells-valence short
Transcript
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•Each row is called a “period”
•The elements in each period have the same number of shells
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•Each column is called a “group”
•Each element in a group has the same number of electrons in their outer orbital, also known as “shells”.
Except for He, it has 2 electrons
•The electrons in the outer shell are called “valence electrons”www.chem4kids.com
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